Explain the importance of the cytochrome

1. Identify the methods by which toxicants enter the body. Provide a brief description and at least two examples of each.
 
2. List and describe the factors that affect the distribution of a toxicant in the body.
 
3. Identify the methods for toxicant elimination. Choose one of the methods and explain how a toxicant is eliminated.
 
4. Explain the importance of the cytochrome P-450 enzyme in toxicant biotransformation.
 
Each question 250 word minimum with cited references